package com.platform.util;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URI;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.apache.commons.io.IOUtils;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

/**
 * @ClassName: HttpClientUtil
 * @Description: http工具类
 * @author ly
 * @date 2018年12月28日 下午2:53:22
 * @version 1.0
 */
public class HttpClientUtil {

	/**
	 * @Title: getRequest
	 * @Description: get请求
	 * @return String 返回类型
	 * @date 2018年12月28日 下午2:53:43
	 * @param url
	 * @param params
	 * @return
	 */
	public static String getRequest(String url, Map<String, String> params) {
		// 创建Httpclient对象
		CloseableHttpClient httpclient = HttpClients.createDefault();
		String resultString = "";
		CloseableHttpResponse response = null;
		try {
			// 创建uri
			URIBuilder builder = new URIBuilder(url);
			if (params != null) {
				for (String key : params.keySet()) {
					builder.addParameter(key, params.get(key));
				}
			}
			URI uri = builder.build();
			// 创建http GET请求
			HttpGet httpGet = new HttpGet(uri);
			// 执行请求
			response = httpclient.execute(httpGet);
			// 判断返回状态是否为200
			if (response.getStatusLine().getStatusCode() == 200) {
				resultString = EntityUtils.toString(response.getEntity(), "UTF-8");
			}
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				if (response != null) {
					response.close();
				}
				httpclient.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		return resultString;
	}

	/**
	 * @Title: postRequest
	 * @Description: post请求
	 * @return String 返回类型
	 * @date 2018年12月28日 下午2:54:13
	 * @param url
	 * @param params
	 * @return
	 */
	public static String postRequest(String url, Map<String, String> params) {
		// 创建Httpclient对象
		CloseableHttpClient httpClient = HttpClients.createDefault();
		CloseableHttpResponse response = null;
		String resultString = "";
		try {
			// 创建Http Post请求
			HttpPost httpPost = new HttpPost(url);
			// 创建参数列表
			if (params != null) {
				List<NameValuePair> paramList = new ArrayList<NameValuePair>();
				for (String key : params.keySet()) {
					paramList.add(new BasicNameValuePair(key, params.get(key)));
				}
				// 模拟表单
				UrlEncodedFormEntity entity = new UrlEncodedFormEntity(paramList, "utf-8");
				httpPost.setEntity(entity);
			}
			// 执行http请求
			response = httpClient.execute(httpPost);
			resultString = EntityUtils.toString(response.getEntity(), "utf-8");
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				response.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		return resultString;
	}

	/**
	 * @Title: postRequestJson
	 * @Description: postJson请求
	 * @return String 返回类型
	 * @date 2018年12月28日 下午2:55:15
	 * @param url
	 * @param json
	 * @return
	 */
	public static String postRequestJson(String url, String json) {
		// 创建Httpclient对象
		CloseableHttpClient httpClient = HttpClients.createDefault();
		CloseableHttpResponse response = null;
		String resultString = "";
		try {
			// 创建Http Post请求
			HttpPost httpPost = new HttpPost(url);
			// 创建请求内容
			StringEntity entity = new StringEntity(json, ContentType.APPLICATION_JSON);
			httpPost.setEntity(entity);
			// 执行http请求
			response = httpClient.execute(httpPost);
			resultString = EntityUtils.toString(response.getEntity(), "utf-8");
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				response.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		return resultString;
	}

	/**
	 * @Title: httpPost
	 * @Description: post请求
	 * @return String 返回类型
	 * @date 2018年12月28日 下午2:54:44
	 * @param httpUrl        url路径
	 * @param data           json数据
	 * @param connectTimeout 连接超时时间
	 * @param readTimeout    读取超时时间
	 * @return
	 * @throws IOException
	 */
	public static String httpPost(String httpUrl, String data, int connectTimeout, int readTimeout) throws IOException {
		OutputStream outPut = null;
		HttpURLConnection urlConnection = null;
		InputStream in = null;
		try {
			URL url = new URL(httpUrl);
			urlConnection = (HttpURLConnection) url.openConnection();
			urlConnection.setRequestMethod("POST");
			urlConnection.setDoOutput(true);
			urlConnection.setDoInput(true);
			urlConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");
			urlConnection.setConnectTimeout(connectTimeout);
			urlConnection.setReadTimeout(readTimeout);
			urlConnection.connect();
			// POST data
			outPut = urlConnection.getOutputStream();
			outPut.write(data.getBytes("UTF-8"));
			outPut.flush();
			// read response
			if (urlConnection.getResponseCode() < 400) {
				in = urlConnection.getInputStream();
			} else {
				in = urlConnection.getErrorStream();
			}
			List<String> lines = IOUtils.readLines(in, urlConnection.getContentEncoding());
			StringBuffer strBuf = new StringBuffer();
			for (String line : lines) {
				strBuf.append(line);
			}
			System.out.println(strBuf.toString());
			return strBuf.toString();
		} finally {
			IOUtils.closeQuietly(outPut);
			IOUtils.closeQuietly(in);
			if (urlConnection != null) {
				urlConnection.disconnect();
			}
		}
	}
}
